Gravity-lock.



PATENTED MAR. 24, 1908.-

YUNKBR; GRAVITY LOCK.

APPLICATION FILED DEO.-27,1907.

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No. 882,921. PATBNTBD MAR. 24, 1908.

G. YUNKER.

GRAVITY LOCK.

APPLIOATION FILED DEO.27,1907.

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l lim lilll M' W WIW UNITED strAtrEs PA ENT OFFICE.

GOTTLIEB YUNKER, OF NEWARK, NEW JERSEY, ASSIGNOR TO NEWARK GORNICE &SKYLIGHT WORKS, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

GRAVITY-LOCK.

Application filed December 27, 1907.

To all whom it may concern:

Be it known that LGoTTLIEB YUNKER, a naturalized citizen of the UnitedStates, and a resident of Newark, in the county of Essex and State ofNew Jersey, have invented cer tain new and useful Improvements inGravity-Locks, of which the following is a specification.

My invention relates to gravity locks for windows; and particularly toalock adapted to be used in connection with fire-proof windows of theswinging sash type, adapted to automatically close and lock when exposedto a temperature of sufficient intensity.

It has for its object a device which will lock the sash at the top, doesnot project to any appreciable extent perpendicularly to the sash, andwhich is capable of a gravity adjustment. I attain these objects in thelock illustrated in the accompanying drawings, in which Figure 1 is aside elevation of the window, partly in section and showing the sash inclosed and open osition, the latter position being shown in otted lines.Figs. 2 and 3 are partial front elevations on an enlarged scale, showingthe sash in locked and unlocked osition. Fig. 4 is a side elevation ofthe 100 on an enlarged scale. Fig. 5 is a view on an enlarged scale ofthe socket plates with sash removed.

Similar characters of reference designate correspondingparts throughoutthe several views.

Referrin to the drawings, 10 designates a sheet meta frame of the usualconstruction and to which is fitted a sheet metal sash 11, provided withwired glass window panes 12. This sash is pivoted to the frame in such amanner as to be gravity closing, and when held open will automaticallyreturn to closed position if released.

13 and 14 are socket plates, the plate 13 being secured to the lintel offrame 10 as shown; and the striking plate 14 to the plate 13, said late14 being slotted and thereby adjustable with respect to the other bymeans of the adjusting screws 15.

Respective openings 16 and 17 adapted to register with each other, areprovided in said plates; and by adjusting the plate 14 with respect toplate 13, the combined opening may be correspondingly varied. An opening18 is also cut in the lintel of the frame 10, and registers with thesaid combined open- Specification of Letters Patent.

Patented March 24, 1908.

Serial No. 408,289.

ing so as to permit a latch bolt 19 to pass through. This latch boltpasses through and is guided in a lock casing 20, being provided with anupper and a lower lug21 and 2 adapted to act against the up er and lowerwall of said casing, and there y limit the vertical movement of saidlatch bolt. The lower end of this latch bolt extends beyond the casing20, and is provided with a projecting hook 23 and aneye 24. To the eye24 is secured a chain 25 provided with the usual fusible connection (notshown) and adapted to be secured to some holding means as a hook 26 tohold the window sash 11 open. To the casing 20 is secured an arm 27pivotally supporting a lever 28, the inner arm of which is arranged toen a e the hook 23, while the outer arm is provided with an adjustableweight 29 whose position is fixed with respect to said lever by means ofthe thumb-screw 30.

When the sash is closed, the weight 29 through the action of the innerarm of the lever 28 against the hook 23 causes the latch bolt to beforced u into and through the openings 16, 17, MM 18 to lock said sash11.

to its frame 10. In order to 0 en the window, the chain 25 attached to te latch bolt 18 is pulled downwardly in opposition to the action of theweight 29. This causes the hook 23 to act against the inner arm of lever28 thereby releasing the latch bolt from the socket plates 13 and 14.,permitting the window sash to be swung inwardly to 0 en the window. Thechain is then fastene to the chain hook 26 and will automatically partat a fusible connection should heat of sufficient intensity reach thispoint, causing the sash to close; and through the action of the weight29 and lever 28, to lock the window at the top.

My improved lock may be readily applied to window sashes does notproject in an unsightly manner in a direction perpendicular to saidsash; and by means of the adjustable weight, one uniform size of lock isapplicable to various sizes and weights of window sashes.

I cl aim:

1. In a window of the swinging sash type: a gravity lock for said windowcomprising, a lock casing secured to the sash of said window; a latchbolt guided therein; means in connection with the frame of said window,adapted to receive said latch bolt to lock said window sash; and a leverprovided with an cause said latch bolt to project beyond its saidcasing.

2. In windows of the swinging sash type: a gravity lock forsaid windowcomprising, a lock casing secured to the sash of said window; a latchbolt guided therein and provided with an upper and a lower lug, ada tedto act against the walls of said casing to imit the extent of verticalmovement of said latch bolt; a hook integral with said latch bolt andoutside of said casing; a lever pivotally connected to said casing, itsinner arm being adapted to en age said hook and its outer arm provideweight; and an eye at the lower end of said latch bolt.

Signed at Newark, in thecounty of Essex and State of New Jersey this10th day of December A. D; 1907.

GOTTLIEB YUNKER.

Witnesses:

G. WILBERFOROE EGNER, FREDH F. SoHUETz.

with an adjustable 15

